Proc. IODP, 313, Data report: grain size distribution of Miocene successions, IODP Expedition 313 Sites M0027, M0028, and M0029, New Jersey shallow shelf

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Chapter contents Abstract Introduction Methods and materials Premeasurement treatment of sediment samples Measurement Materials Results Types of grain-size frequency curves Stratigraphic trends of average grain-size variations Stratigraphic trends of types of grain-size distribution Conclusions Acknowledgments References Figures F1. Site map. F2. Types 1–16. F3. Types A–H. F4. Grain-size trends, Site M0027. F5. Grain-size trends, Site M0028. F6. Grain-size trends, Site M0029. Tables T1. Grain-size analysis, Hole M0027A. T2. Grain-size analysis, Hole M0028A. T3. Grain-size analysis, Hole M0029A. T4. Distribution of grain-size frequency types. PDF file			Previous \| Next doi:10.2204/iodp.proc.313.201.2014 Data report: grain size distribution of Miocene successions, IODP Expedition 313 Sites M0027, M0028, and M0029, New Jersey shallow shelf¹ Hisao Ando,² Miho Oyama,³ and Futoshi Nanayama⁴ Abstract During Integrated Ocean Drilling Program Expedition 313 on the New Jersey shallow shelf, sandy shallow-marine late Eocene to middle Miocene sediments were successfully drilled at three sites (M0027, M0028, and M0029). From the upper unconsolidated intervals, ~634 m thick overall, a total of 275 sediment samples were analyzed for grain-size distributions. Average (arithmetic mean) grain size ranges from fine silt to coarse sand, passing from medium silt to medium sand because of the limited occurrence of coarse silt and fine sand. Silty sediments dominate overall, and clay-dominated sediments were not recognized. Average grain-size data plotted on the equivalent intervals of geologic columnar sections show that stratigraphic changes concordantly reflect lithology and sequence stratigraphy at all three sites. Grain-size frequency curves of measured sediment samples can be divided into 16 silt and 8 sand sediment types on the basis of shape, mode position, grain size range, and volume of skewed coarser or finer grain components. Lithostratigraphic changes are concordant to average grain-size curves and sequence stratigraphy, in general. ¹ Ando, H., Oyama, M., and Nanayama, F., 2014. Data report: grain size distribution of Miocene successions, IODP Expedition 313 Sites M0027, M0028, and M0029, New Jersey shallow shelf. In Mountain, G., Proust, J.-N., McInroy, D., Cotterill, C., and the Expedition 313 Scientists, Proc. IODP, 313: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.313.201.2014 ² Ibaraki University, Department of Earth Science, Faculty of Science, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan. ando@mx.ibaraki.ac.jp ³ Ibaraki University, Graduate School of Science and Engineering, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan. ⁴ Geological Survey of Japan, AIST, Site 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan. Initial receipt: 28 February 2013 Acceptance: 21 February 2014 Publication: 16 May 2014 MS 313-201 Top of page \| Previous \| Next